Method of converting data outputting sequence in inverse DCT and

Details Method of converting data outputting sequence in inverse DCT and Method of converting data outputting sequence in inverse DCT and

1995-12-29

1998-09-08

Mai, Tan V.

Boots, shoes, and leggings

36472501, G06F 1714

Patent

active

058054839

ABSTRACT:
A data outputting sequence converting method and circuit is disclosed which employs an inverse discrete cosine transform (IDCT) for matching the sequences of a picture signal output from an inverse IDCT unit and those output from a motion compensator in a moving picture coding apparatus. The circuit includes a memory for storing the IDCT-performed data packed in a predetermined unit, a write controller for generating a write address and a write control signal for controlling the operation of writing the IDCT-performed data in said memory and generating a read request signal if the write operation is completed. The circuit also includes a read controller for receiving an accept signal in response to the read request signal and generating a read address and a read control signal for reading the IDCT-performed data from the memory. Since the sequences of a picture signal output from an inverse IDCT and those output from a motion compensator are united by an address mapping method, a separate format converter is not required, thus, post-processing complexity is relieved. Also, the circuit always operates without a processing delay due to the time gap between the request operation and accept operation. A simplified interfacing circuit is provided by mapping a luminance output signal and a chrominance output signal, and a compact hardware implementation can be achieved.

REFERENCES:
patent: 5379351 (1995-01-01), Fandrianto et al.
patent: 5673214 (1997-09-01), Kim et al.

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